US20170106352A1 - Catalyst, a process for preparation of the catalyst and application thereof - Google Patents

Catalyst, a process for preparation of the catalyst and application thereof Download PDF

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US20170106352A1
US20170106352A1 US15/285,127 US201615285127A US2017106352A1 US 20170106352 A1 US20170106352 A1 US 20170106352A1 US 201615285127 A US201615285127 A US 201615285127A US 2017106352 A1 US2017106352 A1 US 2017106352A1
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Prior art keywords
catalyst
ranging
support matrix
hours
catalyst composition
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Inventor
Nagesh Sharma
Ajay Kumar
Katravulapalli VEERA VENKATA SATYA BHASKARA SITA RAMA MURTHY
Anilkumar Mettu
Kalpana Gopalakrishnan
Raksh VIR JASRA
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Reliance Industries Ltd
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Reliance Industries Ltd
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Assigned to RELIANCE INDUSTRIES LIMITED reassignment RELIANCE INDUSTRIES LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GOPALAKRISHNAN, KALPANA, KUMAR, AJAY, METTU, ANILKUMAR, SHARMA, NAGESH, SITA RAMA MURTHY, KATRAVULAPALLI VEERA VENKATA SATYA BHASKARA, VIR JASRA, RAKSH
Publication of US20170106352A1 publication Critical patent/US20170106352A1/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G35/00—Reforming naphtha
    • C10G35/04—Catalytic reforming
    • C10G35/06—Catalytic reforming characterised by the catalyst used
    • C10G35/085—Catalytic reforming characterised by the catalyst used containing platinum group metals or compounds thereof
    • C10G35/09—Bimetallic catalysts in which at least one of the metals is a platinum group metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/62—Platinum group metals with gallium, indium, thallium, germanium, tin or lead
    • B01J23/622—Platinum group metals with gallium, indium, thallium, germanium, tin or lead with germanium, tin or lead
    • B01J23/626—Platinum group metals with gallium, indium, thallium, germanium, tin or lead with germanium, tin or lead with tin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/10—Magnesium; Oxides or hydroxides thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/06—Halogens; Compounds thereof
    • B01J27/135—Halogens; Compounds thereof with titanium, zirconium, hafnium, germanium, tin or lead
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01J27/06—Halogens; Compounds thereof
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    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/64—Pore diameter
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    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
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    • B01J35/67—Pore distribution monomodal
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0201—Impregnation
    • B01J37/0205—Impregnation in several steps
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    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0201—Impregnation
    • B01J37/0207—Pretreatment of the support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0236—Drying, e.g. preparing a suspension, adding a soluble salt and drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/16—Reducing
    • B01J37/18—Reducing with gases containing free hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/22—Halogenating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/22—Halogenating
    • B01J37/24—Chlorinating
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
    • C10G11/04—Oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J23/56—Platinum group metals
    • B01J23/63—Platinum group metals with rare earths or actinides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10—Feedstock materials
    • C10G2300/1037—Hydrocarbon fractions
    • C10G2300/104—Light gasoline having a boiling range of about 20 - 100 °C
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
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    • C10G2300/1044—Heavy gasoline or naphtha having a boiling range of about 100 - 180 °C
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
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    • C10G2400/02—Gasoline
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
    • C10G2400/30—Aromatics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Definitions

  • the present disclosure relates to a catalyst comprising support matrix, active metal, promoter metal and halide, wherein the support matrix is additionally subjected to a modifier to obtain a modified support matrix.
  • the catalyst of the present disclosure exhibits increased activity, selectivity and stability when used for reforming process. Besides that it enhances the reformate yield with reduced coke formation when compared to the available catalyst for reforming process, production of aromatics and improving the quality of reformate.
  • the disclosure further relates to the process for preparing the catalyst of the present disclosure.
  • the catalyst of the present disclosure derived from the process described herein, displays lower deactivation rate during reactions demonstrating reduced regeneration frequency, thereby making the catalyst economically feasible.
  • Catalytic reforming is a well-established industrial process applied by the petroleum industry for improving the octane quality of naphtha and production of aromatics.
  • a functional catalyst is employed which contains metal function, to govern reactions such as dehydrogenation and hydrogenation of naphthenes.
  • the catalyst deactivates continuously due to coking, and as the coke builds up on the catalyst surface, the reaction temperature has to be increased gradually to offset the loss of catalyst activity. Over a period of time it is no longer feasible economically to continue operations.
  • the present disclosure relates to a catalyst comprising components including but not limiting to a support matrix subjected to a modifier to obtain a modified support matrix, active metal, promoter metal and halide.
  • the support matrix of the catalyst of the present disclosure is modified by contacting the support matrix with modifier such as chemical element including but not limiting to alkaline earth metal and lanthanide, or a combination thereof.
  • the present disclosure relates to a catalyst comprising an aluminum support matrix, modified by combination of alkaline earth metal and lanthanide.
  • This modified catalyst is thereafter chlorinated and impregnated with platinum and tin to obtain the final catalyst of the present disclosure.
  • the present disclosure further relates to a process for preparing the catalyst composition, said process comprising steps of:
  • the present disclosure relates to a use of the catalyst composition for reducing coke formation to at least 4% to 5% per kg of a feed, wherein the catalyst composition comprises support matrix, active metal, promoter metal and halide and wherein the support matrix is a modified support matrix.
  • the catalyst of the present disclosure has a lower deactivation rate and increased activity, selectivity and stability, leading to reduced regeneration frequency and increased economic feasibility.
  • the catalyst also provides for increased reformate yield, suppression of acid site cracking and reduced coke formation during catalytic reforming process.
  • FIG. 1 Illustrates C5+ reformate yield at SOR and EOR for catalyst-2 and reference catalyst.
  • FIG. 2 Illustrates C8 aromatics yield over hours on stream for catalyst-2 and reference catalyst.
  • FIG. 3 Illustrates total aromatics yield over hours on stream for catalyst-2 and reference catalyst.
  • FIG. 4 Illustrates acidity sites of catalyst-2 and reference catalyst, analyzed by using NH3-TPD adsorption-desorption method.
  • FIG. 5 Illustrates temperature programmed reduction (TPR) profiles for catalyst-2 and reference catalyst.
  • FIG. 6 Illustrates pore size distribution of catalyst-2 and reference catalyst, analyzed by using Barret-Joyner-Halenda (BJH) method.
  • BJH Barret-Joyner-Halenda
  • FIG. 7 Illustrates C8 aromatic yield with respect to the catalysts (catalyst-2, catalyst-3 and catalyst-4) of the present disclosure and reference catalyst.
  • FIG. 8 Illustrates total aromatic yield with respect to the catalysts (catalyst-2, catalyst-3 and catalyst-4) of the present disclosure and reference catalyst.
  • FIG. 9 Illustrates C5+ reformate yield at SOR and EOR for catalyst-3 and reference catalyst.
  • FIG. 10 Illustrates C8 aromatics yield over hours on stream for catalyst-3 and reference catalyst.
  • FIG. 11 Illustrates total aromatics yield over hours on stream for catalyst-3 and reference catalyst.
  • FIG. 12 Illustrates C5+ reformate yield at SOR and EOR for catalyst-4 and reference catalyst.
  • FIG. 13 Illustrates C8 aromatics yield over hours on stream for catalyst-4 and reference catalyst.
  • FIG. 14 Illustrates total aromatics yield over hours on stream for catalyst-4 and reference catalyst.
  • the present disclosure relates to a composition, wherein the composition is a catalyst having a catalytic activity which provides for an increased reformate yield and reduced coke formation during the process of catalytic reforming.
  • the catalyst of the present disclosure has lower deactivation rate and increased activity, selectivity and stability, leading to reduced regeneration frequency and increased economic feasibility.
  • the catalyst of the present disclosure is a reforming catalyst.
  • the catalyst of the present disclosure comprises components including but not limiting to a support matrix, active metal, promoter metal and halide, wherein the support matrix is additionally subjected to a modifier to obtain a modified support matrix.
  • the present disclosure thus provides a catalyst whose performance is improved with simultaneous optimization of acid site cracking through the use of support matrix modification with alkaline earth metals and lanthanides.
  • the support matrix of the catalyst is an inorganic oxide including but not limiting to alpha alumina, theta alumina, gamma alumina, delta alumina, eta alumina, silica alumina, cordierite, zirconia, titania, zeolites and non-zeolitic molecular sieves (NZMS), or any combination thereof.
  • the support matrix includes but is not limited to alpha alumina, theta alumina, gamma alumina, delta alumina, eta alumina, theta alumina and silica alumina, or any combination thereof.
  • the support matrix is gamma alumina.
  • the support matrix including but not limiting to alpha alumina, theta alumina, gamma alumina, delta alumina, eta alumina, silica alumina, cordierite, zirconia, titania, zeolites and non-zeolitic molecular sieves (NZMS), or any combination thereof, is modified by contacting said support matrix with modifier such as chemical element including but not limiting to alkaline earth metal and lanthanide, or any combination thereof.
  • modifier such as chemical element including but not limiting to alkaline earth metal and lanthanide, or any combination thereof.
  • the alkaline earth metal includes but is not limited to beryllium, magnesium, calcium, strontium, and barium, or any combination thereof.
  • the lanthanide includes but is not limited to lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, or any combination thereof.
  • the support matrix of the catalyst is modified by the alkaline earth metal such as magnesium and barium, or a combination thereof. In an alternate preferred embodiment, the support matrix of the catalyst is modified by lanthanum.
  • the support matrix of the catalyst is modified by a combination of an alkaline earth metal such as magnesium and a lanthanide such as lanthanum.
  • the support matrix of the catalyst may comprise a combination of magnesium and lanthanum.
  • the active metal of the catalyst includes but is not limited to ruthenium, rhodium, palladium, osmium, iridium and platinum, or any combination thereof.
  • the active metal of the catalyst is platinum.
  • the promoter metal of the catalyst includes but is not limited to tin, germanium, rhenium, gallium, bismuth, lead, indium, cerium and zinc, or any combination thereof.
  • the promoter metal of the catalyst is tin.
  • the halide of the catalyst includes but is not limited to fluorine, chlorine and bromine, or any combination thereof.
  • the halide of the catalyst is either in the elemental form or in the ionic form.
  • the halide of the catalyst is in the ionic form, wherein the halide is chloride.
  • the modifier including but not limiting alkaline earth metal such as magnesium and barium and lanthanide such as lanthanum, independently or in combination within the catalyst are at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • the magnesium and barium, independently or in combination within the catalyst are at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • the lanthanum within the catalyst is at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • the active metal such as platinum within the catalyst is at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • the platinum within the catalyst is at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • the promoter metal such as tin within the catalyst is at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • the tin within the catalyst is at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • the halide such as chloride within the catalyst is at a concentration ranging from about 0.8 wt % to about 1.2 wt %.
  • the chloride within the catalyst is at a concentration ranging from about 0.8 wt % to about 1.2 wt %.
  • the concentration of the support matrix within the catalyst is the remaining percentage with respect to cumulative percentages of the components such as active metal, promoter metal and halide, wherein the active metal is at a concentration ranging from about 0.01 wt % to about 0.5 wt %, the promoter is at a concentration ranging from about 0.01 wt % to about 0.5 wt % and the halide is at a concentration ranging from about 0.8 wt % to about 1.2 wt %.
  • the concentration of the support matrix is about 99.18 wt %.
  • concentration of the active metal is about 0.5 wt %
  • concentration of the promoter metal is about 0.5 wt % and the concentration of the halide is about 1.2 wt %
  • concentration of support matrix is about 97.8 wt %.
  • the present disclosure relates to a catalyst comprising a gamma aluminum support matrix, modified by combination of alkaline earth metal and lanthanide in the form of magnesium and lanthanum.
  • This modified catalyst is thereafter chlorinated and impregnated with platinum and tin to obtain the final catalyst of the present disclosure, which provides for an increased reformate yield and reduced coke formation during the process of catalytic reforming.
  • the catalyst of the present disclosure provides stable performance towards activity and selectivity for total aromatics during naphtha reforming.
  • the catalyst of the present disclosure is a bi-functional catalyst having both metal function and an acidic function.
  • the present disclosure also relates to a process for preparing the catalyst herein comprising support matrix, active metal, promoter metal and halide, wherein the support matrix is additionally subjected to a modifier to obtain a modified support matrix.
  • the process for preparing the catalyst of the present disclosure comprises acts of:
  • the process for preparing the catalyst of the present disclosure comprises acts of:
  • the process for preparing the catalyst of the present disclosure comprises acts of:
  • the process for preparing the catalyst of the present disclosure comprises acts of:
  • the modifier including but not limiting to alkaline earth metal such as magnesium and barium employed in the process for preparing the catalyst of the present disclosure ranges from about 0.01 wt % to about 0.5 wt %.
  • the modifier including but not limiting to lanthanide such as lanthanum employed in the process for preparing the catalyst of the present disclosure ranges from about 0.01 wt % to about 0.5 wt %.
  • the halide such as chloride employed in the process for preparing the catalyst of the present disclosure ranges from about 0.8 wt % to about 1.2 wt %.
  • the active metal such as platinum employed in the process for preparing the catalyst of the present disclosure ranges from about 0.01 wt % to about 0.5 wt %.
  • the promoter metal such as tin employed in the process for preparing the catalyst of the present disclosure ranges from about 0.01 wt % to about 0.5 wt %.
  • the process for preparing of catalyst of the present disclosure comprises acts of:
  • the magnesium in the process for preparing the catalyst of the present disclosure ranges from about 0.01 wt % to about 0.5 wt %.
  • the chloride in the process for preparing the catalyst of the present disclosure ranges from about 0.8 wt % to about 1.2 wt %.
  • the platinum in the process for preparing the catalyst of the present disclosure ranges from about 0.01 wt % to about 0.5 wt %.
  • the tin in the process for preparing the catalyst of the present disclosure is ranging from about 0.01 wt % to about 0.5 wt %.
  • platinum solution and tin solution are prepared by using precursors including but not limiting to hexacholoroplatinic acid (H 2 PtCl 6 . (H 2 O) 6 ) and tin chloride (SnCl 2 ), respectively, wherein the hexacholoroplatinic acid is at a concentration of about 19.03 mg/ml and tin chloride at a concentration of about 115.04 mg/ml, respectively.
  • precursors including but not limiting to hexacholoroplatinic acid (H 2 PtCl 6 . (H 2 O) 6 ) and tin chloride (SnCl 2 ), respectively, wherein the hexacholoroplatinic acid is at a concentration of about 19.03 mg/ml and tin chloride at a concentration of about 115.04 mg/ml, respectively.
  • the concentration of the precursors of platinum and tin are adjusted in order to have platinum and tin within the catalyst at a concentration ranging from about 0.01 wt % to about 0.5 wt %.
  • hydrogen chloride solution is added to the solution of H 2 PtCl 6 . (H 2 O) 6 and SnCl 2 in order to avoid precipitation of metal chloride solution.
  • the modified alumina support of the present disclosure is added and immersed for a time period ranging from about 6 hours to about 18 hours, preferably 12 hrs, at a temperature ranging from about 15° C. to about 35° C. with intermediate gentle stirring.
  • the solid (alumina support) to solution ratio is in the range of about 1:5. This is followed by removing the solution by subjecting it to rotary evaporation having a maximum speed of 50 rpm at a temperature ranging from about 40° C. to about 60° C.
  • the process for preparation of catalyst of the present disclosure reduces weak and strong acid site in the catalyst and thereby increases the activity and stability of the catalyst. Both weak acid site and strong acid site in the magnesium modified catalyst is reduced in comparison to the priorly known catalysts in the art. Further, the catalyst (catalyst-2) of the present disclosure tends to have 3 peaks, wherein first peak shall correspond to weak acid sites, second peak shall correspond to medium to strong acid sites and third peak shall correspond to very strong acid sites. This distinct difference in the acidity pattern of the catalyst of the present disclosure plays a significant role in performance and stability of the catalyst, unmodified catalyst (reference catalyst).
  • the process for preparing the catalyst of the present disclosure causes higher active metal dispersion of about 98% in the catalyst of the present disclosure when compared to unmodified catalyst (reference catalyst) having the active metal dispersion of about 86%. It is critical to note that higher active metal dispersion in the catalyst, indicates stronger interaction between the metal and the modified support matrix, which in turn is responsible for enhanced activity and stability of the catalyst.
  • pore size distribution of the catalyst of the present disclosure ranges from about 20° A to about 100° A, when compared to the unmodified catalyst (reference catalyst), wherein the pore size distribution ranges from about 30° A to about 150° A. Due to a narrower pore size distribution in the catalyst of the present disclosure, there is a higher dispersion of active metal and promoter metal, either individually or in combination, thereby leading to higher stability and increased activity of the catalyst of the present disclosure.
  • FIG. 6 illustrates the pore size distribution of the catalyst of the present disclosure and that of the unmodified catalyst (reference catalyst).
  • the catalyst of the present disclosure demonstrates a total C8 aromatics yield ranging from about 33% to about 35% at the start of the reaction (SOR) and ranging from about 21% to about 29% at the end of the reaction (EOR), when compared to the unmodified catalyst (reference catalyst) which demonstrate the total C8 aromatics yield of about 32% at the start of the reaction (SOR) and about 20% at the end of the reaction (EOR).
  • FIG. 7 illustrates the total C8 aromatics yield of the catalysts of the present disclosure and that of the unmodified catalyst (reference catalyst).
  • the catalyst of the present disclosure demonstrates a total aromatics yield ranging from about 78% to about 81% at the start of the reaction (SOR) and ranging from about 48% to about 67% at the end of the reaction (EOR), when compared to unmodified catalyst (reference catalyst) which demonstrates the total aromatics yield of about 75% at the start of the reaction (SOR) and about 44% at the end of the reaction (EOR).
  • FIG. 8 illustrates the total aromatics yield of the catalysts of the present disclosure and that of the unmodified catalyst (reference catalyst).
  • the catalyst of the present disclosure exemplifies greater hours of stream in a catalytic reaction when compared to the unmodified reforming catalyst.
  • the catalyst of the present disclosure demonstrates at least 60 hours of stream in a catalytic reaction when compared to the unmodified reforming catalyst.
  • the catalyst of the present disclosure exemplifies reduced coke formation of about 3% when compared to the coke formation of about 6% when employing unmodified catalyst (reference catalyst) in a reaction.
  • the reduced coke formation/deposition demonstrated by the catalyst of the present disclosure corroborates with the reduced acid site and higher metal dispersion on the catalyst of the present disclosure.
  • contact or contacting defined in the instant specification independently refers to impregnation, immersion and/or saturation, wherein there is a thorough interaction between the components.
  • the expression catalyst-2 described in the instant specification refers to the catalyst of the present disclosure having magnesium modified support matrix.
  • the expression catalyst-3 described in the instant specification refers to the catalyst of the present disclosure having barium modified support matrix.
  • the expression catalyst-4 described in the instant specification refers to the catalyst of the present disclosure having Lanthanum modified support matrix.
  • Example 1 Process of Preparing the Catalyst of the Present Disclosure Modification of Alumina Support
  • alumina support is dried at a temperature of about 120° C. for about 12 hrs to remove the surface organic impurities and moisture.
  • the dried alumina is immersed in a container containing magnesium nitrate solution (about 0.95 g of magnesium nitrate in about 150 ml water, wherein the metal (magnesium) content is 0.3 wt %) having a pH of about 5 to about 6 for about 6 hrs.
  • the solution is removed by subjecting the immersed alumina with the solution to an equilibrium-rotary evaporator at 50° C. to obtain magnesium modified alumina.
  • the magnesium modified alumina is dried at a temperature of about 120° C. for about 12 hrs to about 15 hrs in an oven and calcined at a temperature of about 540° C. for about 6 hrs.
  • alumina support is dried at a temperature of about 120° C. for about 12 hrs to remove the surface organic impurities and moisture.
  • the dried alumina is immersed in a container containing barium nitrate solution (about 0.171 g of barium nitrate in about 150 ml of water, wherein the metal (barium) content is 0.3 wt %) having a pH of about 5 to about 6 for about 6 hrs.
  • the solution is removed by subjecting the immersed alumina with the solution to a equilibrium-rotary evaporator at 50° C. to obtain barium modified alumina.
  • the barium modified alumina is dried at a temperature of about 120° C. for about 12 hrs to about 15 hrs in an oven and calcined at a temperature of about 540° C. for about 6 hrs.
  • alumina support is dried at a temperature of about 120° C. for about 12 hrs to remove the surface organic impurities and moisture.
  • the dried alumina is immersed in a container containing lanthanum nitrate (about 0.28 g of lanthanum nitrate in about 150 ml of distilled water, wherein the metal (lanthanum) content is 0.3 wt %) solution having a pH of about 5 to about 6 for about 6 hrs. Thereafter, the solution is removed by subjecting the immersed alumina with the solution to a equilibrium-rotary evaporator at 50° C. to obtain lanthanum modified alumina. Upon removal of the solvent, the lanthanum modified alumina is dried at a temperature of about 120° C. for about 12 hrs to about 15 hrs in an oven and calcined at a temperature of about 540° C. for about 6 hrs.
  • calcined modified alumina support such as magnesium modified alumina, barium modified alumina and lanthanum modified alumina, respectively is immersed in about 150 ml of hydrochloride solution comprising about 0.8 ml of 35% aqueous hydrogen chloride (molarity of about 11.5) for about 12 hrs (ratio of alumina support to the volume of hydrogen chloride solution is about 1:5), followed by drying the modified alumina at a temperature of about 120° C. for about 12 hrs to about 14 hrs to obtain chlorinated magnesium-alumina support, chlorinated barium-alumina support and chlorinated lanthanum-alumina support, respectively.
  • hydrochloride solution comprising about 0.8 ml of 35% aqueous hydrogen chloride (molarity of about 11.5) for about 12 hrs (ratio of alumina support to the volume of hydrogen chloride solution is about 1:5), followed by drying the modified alumina at a temperature of about 120° C. for about 12 hrs to about 14 hrs to
  • chlorinated magnesium modified alumina support About 30 g chlorinated magnesium modified alumina support, about 30 g of chlorinated barium-alumina support and about 30 g of chlorinated lanthanum-alumina support, respectively is immersed in a solution of platinum and tin solutions, which in-turn were prepared by using (H 2 PtCl 6 . (H 2 O) 6 ) and SnCl 2 , respectively.
  • the ratio of the impregnating solution (solution of platinum and tin) to the chlorinated magnesium alumina support, chlorinated barium-alumina support and chlorinated lanthanum-alumina support, respectively is about 1:5 (by weight) (solid to liquid ratio).
  • 0.8964 ml of 35% hydrogen chloride solution (molarity of about 11.5) is added in order to avoid the precipitation of metal chloride in the solution.
  • chlorinated magnesium-alumina support, chlorinated barium-alumina support and chlorinated lanthanum-alumina support, respectively is immersed for about 12 hrs to about 15 hrs at a temperature of about 27° C. to about 35° C. with intermediate stirring.
  • the solution is removed using equilibrium-rotary evaporator, followed by drying the alumina support having metals, at a temperature of about 120° C. for about 12 hrs in an oven.
  • the dried chlorinated magnesium-alumina support, chlorinated barium-alumina support and chlorinated lanthanum-alumina support, respectively having platinum and tin is finally calcined at a temperature of about 540° C. for about 6 hrs to obtain the final catalyst.
  • catalyst including but not limiting to active metal such as ruthenium, rhodium, palladium, osmium, iridium, promoter metal such as germanium, rhenium, gallium, bismuth, lead, indium, cerium and zinc, wherein the support matrix of the catalyst is modified by alkaline earth metal such as beryllium, calcium and strontium and lanthanide such as cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium.
  • active metal such as ruthenium, rhodium, palladium, osmium, iridium, promoter metal such as germanium, rhenium, gallium, bismuth, lead, indium, cerium and zinc
  • alkaline earth metal such as beryllium, calcium and str
  • Example 2 Comparative Example Illustrating the Catalytic Activity of the Catalyst of the Present Disclosure (Catalyst-2, M-Alumina Catalyst) and that of the Unmodified Catalyst (Reference Catalyst)
  • Catalyst-2 Mg-alumina Reference catalyst catalyst SOR EOR SOR EOR Inlet 521 540 521 540 temperature H2 2.11 0.52 1.33 0.77 C1 1.11 2.16 0.74 1.43 C2 2.10 3.99 1.50 3.00 C3 3.71 5.72 3.53 4.56 IC4 1.93 2.06 1.96 2.06 NC4 2.29 3.37 1.82 2.61 Total Gas YLD 13.25 17.83 10.88 14.42 C6 A 1.25 0.62 1.49 1.10 C7 A 16.25 10.35 18.14 15.34 Total C8 A 32.20 20.44 34.17 28.29 C9 A 19.86 11.22 20.14 16.69 C10 A 4.75 2.33 4.22 3.64 C11+A 1.53 0.00 1.09 1.36 Total AR. 75.84 44.96 79.24 66.42 Corr. C5 + YLD 86.75 82.17 89.12 85.58
  • FIG. 4 illustrates that both the weak acid site and strong acid site in catalyst-2 is reduced when compared to the reference catalyst.
  • FIG. 4 illustrates three peaks, wherein 1 st peak is at about 260° C. corresponding to weak acid site, 2 nd peak is at about 440° C. corresponding to medium to strong acid site and 3 rd peak is at about 700° C. corresponding to very strong acid site in the reference catalyst, whereas the peaks are not observed in catalyst-2.
  • Temperature Programmed Reduction is carried out on a Micrometrics Autochem II chemisorption analyser instrument using about 200 mg samples (catalyst 2 and reference catalyst, respectively) for each experiment.
  • the catalyst reference catalyst and catalyst-2, respectively
  • TCD thermal conductivity signal
  • H2-TPR is started from about room temperature to about 900° C. at a heating rate of about 10° C./min in about 10 ml/min of 8% H 2 in Ar.
  • a thermal conductivity detector (TCD) is used to monitor the consumption of H2.
  • FIG. 5 illustrates the temperature programmed reduction (TPR) profiles for catalyst-2 and reference catalyst, wherein three reduction peaks are observed for catalyst-2 at 280° C., 320° C. and 480° C., respectively.
  • the first peak at 280° C. is observed due to the reduction of platinum oxide and/or oxychlorplatinum surface complex
  • the second peak observed at 320° C. is attributed to reduction of a part of Sn species from Sn 4+ to Sn 2+ state.
  • thermal conductivity detector (TCD) signal is an indication of hydrogen consumption during TPR studies.
  • the TCD signal obtained with the catalyst-2 is very sharp (at 320° C. and 480° C. respectively) in comparison with the reference catalyst, which exemplifies the strong metal and support interaction which is responsible for enhanced activity and stability of catalyst-2, unlike the reference catalyst.
  • FIG. 6 illustrates that the pore size distribution of catalyst-2 is ranging from about 20° A to about 100° A, whereas the pore size distribution of the reference catalyst is ranging from about 30° A to about 150° A.
  • the narrower pore size distribution observed in catalyst-2 demonstrates that the metal (Pt) dispersion is proportionately high when compared to the reference catalyst having wider pore size distribution and thereby catalyst-2 demonstrates better performance stability when compared to the reference catalyst.
  • Example 6 Comparative Analysis of the Catalyst of the Present Disclosure (Catalyst-3 Ba-Alumina Catalyst) with that of the Unmodified Catalyst (Reference Catalyst)
  • Catalyst-3 Reference catalyst (Ba-alumina catalyst) SOR EOR SOR EOR Inlet temperature 521 540 521 540 H2 2.11 0.52 1.72 0.76 C1 1.11 2.16 0.82 1.27 C2 2.10 3.99 2.20 2.47 C3 3.71 5.72 4.22 3.68 IC4 1.93 2.06 2.23 1.45 NC4 2.29 3.37 2.32 2.15 Total Gas YLD 13.25 17.83 13.50 11.77 C6 A 1.25 0.62 1.66 1.21 C7 A 16.25 10.35 18.61 15.74 Total C8 A 32.20 20.44 33.61 27.85 C9 A 19.86 11.22 19.20 15.70 C10 A 4.75 2.33 3.79 3.42 C11+A 1.53 0.00 1.17 1.69 Total AR. 75.84 44.96 78.05 65.62 Corr. C5 + YLD 86.75 82.17 86.50 88.23
  • the reaction subjected with the catalyst of the present disclosure illustrates the coke content (undesired product) of about 2.6%, which is much lesser than the coke content of about 6.1% illustrated by the reference catalyst. Thereby demonstrating reduced coke deposition in a reaction subjected with the catalyst of the present disclosure.
  • Example 7 Comparative Analysis of the Catalyst of the Present Disclosure (Catalyst-4 La-Alumina Catalyst) with that of the Unmodified Catalyst (Reference Catalyst)
  • Catalyst-4 Reference catalyst La-alumina catalyst
  • the reaction subjected with the catalyst of the present disclosure illustrates the coke content (undesired product) of about 4.5%, which is much lesser than the coke content of about 6.1% illustrated by the reference catalyst. Thereby demonstrating reduced coke deposition in a reaction subjected with the catalyst of the present disclosure.

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US11865515B2 (en) * 2021-12-06 2024-01-09 ExxonMobil Technology and Engineering Company Catalyst for olefins generation

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CN114492029A (zh) * 2022-01-25 2022-05-13 华东理工大学 一种催化裂化过程的多目标优化方法及装置

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US11001767B2 (en) 2019-04-26 2021-05-11 Exxonmobil Research And Engineering Company Naphtha reformer yield using modified zeolitic catalysts
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